1 /* 2 Copyright (c) 1982, 1986, 1993 3 The Regents of the University of California. All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions 7 are met: 8 1. Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 2. Redistributions in binary form must reproduce the above copyright 11 notice, this list of conditions and the following disclaimer in the 12 documentation and/or other materials provided with the distribution. 13 3. Neither the name of the University nor the names of its contributors 14 may be used to endorse or promote products derived from this software 15 without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 SUCH DAMAGE. 28 */ 29 30 #ifndef _SYS_SELECT_H 31 #define _SYS_SELECT_H 32 33 /* We don't define fd_set and friends if we are compiling POSIX 34 source, or if we have included (or may include as indicated 35 by __USE_W32_SOCKETS) the W32api winsock[2].h header which 36 defines Windows versions of them. Note that a program which 37 includes the W32api winsock[2].h header must know what it is doing; 38 it must not call the Cygwin select function. 39 */ 40 # if !(defined (_WINSOCK_H) || defined (_WINSOCKAPI_) || defined (__USE_W32_SOCKETS)) 41 42 #include <sys/cdefs.h> 43 #include <sys/_sigset.h> 44 #include <sys/_timeval.h> 45 #include <sys/timespec.h> 46 47 #if !defined(_SIGSET_T_DECLARED) 48 #define _SIGSET_T_DECLARED 49 typedef __sigset_t sigset_t; 50 #endif 51 52 # define _SYS_TYPES_FD_SET 53 /* 54 * Select uses bit masks of file descriptors in longs. 55 * These macros manipulate such bit fields (the filesystem macros use chars). 56 * FD_SETSIZE may be defined by the user, but the default here 57 * should be enough for most uses. 58 */ 59 #ifndef FD_SETSIZE 60 # ifdef __CYGWIN__ 61 # define FD_SETSIZE 1024 62 # else 63 # define FD_SETSIZE 64 64 # endif 65 #endif 66 67 typedef unsigned long __fd_mask; 68 #if __BSD_VISIBLE 69 typedef __fd_mask fd_mask; 70 #endif 71 72 #define _NFDBITS ((int)sizeof(__fd_mask) * 8) /* bits per mask */ 73 #if __BSD_VISIBLE 74 #define NFDBITS _NFDBITS 75 #endif 76 77 #ifndef _howmany 78 #define _howmany(x,y) (((x) + ((y) - 1)) / (y)) 79 #endif 80 81 typedef struct fd_set { 82 __fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)]; 83 } fd_set; 84 #if __BSD_VISIBLE 85 #define fds_bits __fds_bits 86 #endif 87 88 #define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS)) 89 #define FD_CLR(n, p) ((p)->__fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n)) 90 #if __BSD_VISIBLE 91 #define FD_COPY(f, t) (void)(*(t) = *(f)) 92 #endif 93 #define FD_ISSET(n, p) (((p)->__fds_bits[(n)/_NFDBITS] & __fdset_mask(n)) != 0) 94 #define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n)) 95 #define FD_ZERO(p) do { \ 96 fd_set *_p; \ 97 __size_t _n; \ 98 \ 99 _p = (p); \ 100 _n = _howmany(FD_SETSIZE, _NFDBITS); \ 101 while (_n > 0) \ 102 _p->__fds_bits[--_n] = 0; \ 103 } while (0) 104 105 #if !defined (__INSIDE_CYGWIN_NET__) 106 107 __BEGIN_DECLS 108 109 int select __P ((int __n, fd_set *__readfds, fd_set *__writefds, 110 fd_set *__exceptfds, struct timeval *__timeout)); 111 #if __POSIX_VISIBLE >= 200112 112 int pselect __P ((int __n, fd_set *__readfds, fd_set *__writefds, 113 fd_set *__exceptfds, const struct timespec *__timeout, 114 const sigset_t *__set)); 115 #endif 116 117 __END_DECLS 118 119 #endif /* !__INSIDE_CYGWIN_NET__ */ 120 121 #endif /* !(_WINSOCK_H || _WINSOCKAPI_ || __USE_W32_SOCKETS) */ 122 123 #endif /* sys/select.h */ 124
